diff --git a/Dockerfile b/Dockerfile
index 61d5bc4..7dccee2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,6 @@
 FROM python:3-bullseye
 
 RUN apt-get update && apt-get install -y ffmpeg firefox-esr npm
-ARG TARGETARCH
 RUN if [ $TARGETARCH = "arm64" ]; then \
         apt-get install -y libavformat-dev libavdevice-dev python3-av \
     ; fi